configd.tproj/_snapshot.c

   1 /*
   2  * Copyright (c) 2000-2006, 2009-2011, 2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Modification History
  26  *
  27  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * April 14, 2000               Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <fcntl.h>
  35 #include <paths.h>
  36 #include <unistd.h>
  37
  38 #include "configd.h"
  39 #include "configd_server.h"
  40 #include "session.h"
  41 #include "plugin_support.h"
  42
  43
  44 #define SNAPSHOT_PATH_STATE     _PATH_VARTMP "configd-state"
  45 #define SNAPSHOT_PATH_STORE     _PATH_VARTMP "configd-store.plist"
  46 #define SNAPSHOT_PATH_PATTERN   _PATH_VARTMP "configd-pattern.plist"
  47 #define SNAPSHOT_PATH_SESSION   _PATH_VARTMP "configd-session.plist"
  48
  49
  50 #define N_QUICK 100
  51
  52 static CF_RETURNS_RETAINED CFDictionaryRef
  53 _expandStore(CFDictionaryRef storeData)
  54 {
  55         const void *            keys_q[N_QUICK];
  56         const void **           keys            = keys_q;
  57         CFIndex                 nElements;
  58         CFDictionaryRef         newStoreData    = NULL;
  59         const void *            nValues_q[N_QUICK];
  60         const void **           nValues         = nValues_q;
  61         const void *            oValues_q[N_QUICK];
  62         const void **           oValues         = oValues_q;
  63
  64         nElements = CFDictionaryGetCount(storeData);
  65         if (nElements > 0) {
  66                 CFIndex i;
  67
  68                 if (nElements > (CFIndex)(sizeof(keys_q) / sizeof(CFTypeRef))) {
  69                         keys    = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  70                         oValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  71                         nValues = CFAllocatorAllocate(NULL, nElements * sizeof(CFTypeRef), 0);
  72                 }
  73                 bzero(nValues, nElements * sizeof(CFTypeRef));
  74
  75                 CFDictionaryGetKeysAndValues(storeData, keys, oValues);
  76                 for (i = 0; i < nElements; i++) {
  77                         CFDataRef               data;
  78
  79                         data = CFDictionaryGetValue(oValues[i], kSCDData);
  80                         if (data) {
  81                                 CFPropertyListRef       plist;
  82
  83                                 nValues[i] = CFDictionaryCreateMutableCopy(NULL, 0, oValues[i]);
  84
  85                                 if (!_SCUnserialize(&plist, data, NULL, 0)) {
  86                                         SC_log(LOG_NOTICE, "_SCUnserialize() failed, key=%@", keys[i]);
  87                                         continue;
  88                                 }
  89
  90                                 CFDictionarySetValue((CFMutableDictionaryRef)nValues[i],
  91                                                      kSCDData,
  92                                                      plist);
  93                                 CFRelease(plist);
  94                         } else {
  95                                 nValues[i] = CFRetain(oValues[i]);
  96                         }
  97                 }
  98         }
  99
 100         newStoreData = CFDictionaryCreate(NULL,
 101                                      keys,
 102                                      nValues,
 103                                      nElements,
 104                                      &kCFTypeDictionaryKeyCallBacks,
 105                                      &kCFTypeDictionaryValueCallBacks);
 106
 107         if (nElements > 0) {
 108                 CFIndex i;
 109
 110                 for (i = 0; i < nElements; i++) {
 111                         CFRelease(nValues[i]);
 112                 }
 113
 114                 if (keys != keys_q) {
 115                         CFAllocatorDeallocate(NULL, keys);
 116                         CFAllocatorDeallocate(NULL, oValues);
 117                         CFAllocatorDeallocate(NULL, nValues);
 118                 }
 119         }
 120
 121         return newStoreData;
 122 }
 123
 124
 125 __private_extern__
 126 int
 127 __SCDynamicStoreSnapshot(SCDynamicStoreRef store)
 128 {
 129         CFDictionaryRef                 expandedStoreData;
 130         FILE                            *f;
 131         int                             fd;
 132         CFDataRef                       xmlData;
 133
 134         /* Save a snapshot of configd's "state" */
 135
 136         (void) unlink(SNAPSHOT_PATH_STATE);
 137         fd = open(SNAPSHOT_PATH_STATE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 138         if (fd == -1) {
 139                 return kSCStatusFailed;
 140         }
 141         f = fdopen(fd, "w");
 142         if (f == NULL) {
 143                 return kSCStatusFailed;
 144         }
 145         SCPrint(TRUE, f, CFSTR("Main thread :\n\n"));
 146         SCPrint(TRUE, f, CFSTR("%@\n"), CFRunLoopGetCurrent());
 147         if (plugin_runLoop != NULL) {
 148                 SCPrint(TRUE, f, CFSTR("Plug-in thread :\n\n"));
 149                 SCPrint(TRUE, f, CFSTR("%@\n"), plugin_runLoop);
 150         }
 151         listSessions(f);
 152         (void) fclose(f);
 153
 154         /* Save a snapshot of the "store" data */
 155
 156         (void) unlink(SNAPSHOT_PATH_STORE);
 157         fd = open(SNAPSHOT_PATH_STORE, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 158         if (fd == -1) {
 159                 return kSCStatusFailed;
 160         }
 161
 162         expandedStoreData = _expandStore(storeData);
 163         xmlData = CFPropertyListCreateData(NULL, expandedStoreData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 164         CFRelease(expandedStoreData);
 165         if (xmlData == NULL) {
 166                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 167                 close(fd);
 168                 return kSCStatusFailed;
 169         }
 170         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 171         (void) close(fd);
 172         CFRelease(xmlData);
 173
 174         /* Save a snapshot of the "pattern" data */
 175
 176         (void) unlink(SNAPSHOT_PATH_PATTERN);
 177         fd = open(SNAPSHOT_PATH_PATTERN, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 178         if (fd == -1) {
 179                 return kSCStatusFailed;
 180         }
 181
 182         xmlData = CFPropertyListCreateData(NULL, patternData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 183         if (xmlData == NULL) {
 184                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 185                 close(fd);
 186                 return kSCStatusFailed;
 187         }
 188         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 189         (void) close(fd);
 190         CFRelease(xmlData);
 191
 192         /* Save a snapshot of the "session" data */
 193
 194         (void) unlink(SNAPSHOT_PATH_SESSION);
 195         fd = open(SNAPSHOT_PATH_SESSION, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
 196         if (fd == -1) {
 197                 return kSCStatusFailed;
 198         }
 199
 200         xmlData = CFPropertyListCreateData(NULL, sessionData, kCFPropertyListXMLFormat_v1_0, 0, NULL);
 201         if (xmlData == NULL) {
 202                 SC_log(LOG_NOTICE, "CFPropertyListCreateData() failed");
 203                 close(fd);
 204                 return kSCStatusFailed;
 205         }
 206         (void) write(fd, CFDataGetBytePtr(xmlData), CFDataGetLength(xmlData));
 207         (void) close(fd);
 208         CFRelease(xmlData);
 209
 210         return kSCStatusOK;
 211 }
 212
 213
 214 __private_extern__
 215 kern_return_t
 216 _snapshot(mach_port_t server, int *sc_status, audit_token_t audit_token)
 217 {
 218         serverSessionRef        mySession;
 219
 220         mySession = getSession(server);
 221         if (mySession == NULL) {
 222                 mySession = tempSession(server, CFSTR("SCDynamicStoreSnapshot"), audit_token);
 223                 if (mySession == NULL) {
 224                         /* you must have an open session to play */
 225                         return kSCStatusNoStoreSession;
 226                 }
 227         }
 228
 229         if (!hasRootAccess(mySession)) {
 230                 return kSCStatusAccessError;
 231         }
 232
 233         *sc_status = __SCDynamicStoreSnapshot(mySession->store);
 234         return KERN_SUCCESS;
 235 }